He is very tall.

Highways are convenient for commuting.

This building boasts the maximum height in this town.

This bridge is reinforced with steel wire.

He picked up the steel ball and stared at it intently.

This building is strengthened by using silicon steel.

Koukichi is my best friend.

This bridge is made of silicon steel.

My younger sister became a first-year senior high school student this year.

My younger brother is currently in his third year of high school, preparing for university entrance exams.